Pipe



B. LIEBER Aug. 28, 1956 4 Filed May 10, 1954 INVENTOR flizlzcer BY gm 77 ATTORNEYS? v United States PIPE Ben Lieber, Brooklyn, N. Y., assignor to Aply-Tec Proiliiucts, Inc., Brooklyn, N. Y., a corporation of New Yor Application May 10, 1954, Serial No. 428,441

4 Claims. (Cl. 131-194) This invention has to do with an improvement in pipes, and more particularly in the type of pipe in which the bowl is mounted on a holder, the holder being provided with a draining chamber to trap moisture draining from the bowl and the smoke draw tube.

The improvement consists principally in providing means for adjusting the draft from the bowl. Pipe smoking tobaccos, depending on their composition and treatment, vary quite widely in their burning rate and it is desirable to control the draft to insure the desired rate of combustion for the particular tobacco being smoked.

In the preferred embodiment of this improvement, the draft-adjusting means comprise a threaded stud extending from the bolder into the exit port of the bowl and a threaded nut mounted on said stud capable by rotation of having its position adjusted along the length of the stud and thus of controlling the penetration of the nut into the bowl exit port. This exit port is flared outwardly so that as the threaded nut is moved progressively into the exit port, the free area of the port is progressively decreased, and vice versa, thus providing means for adjusting the draft.

In the drawings, which illustrate a preferred embodi ment of my improvement as applied to a particular type of pipe of known construction,

Fig. l is a perspective view of the assembled pipe;

Pig. 2 is a longitudinal sectional side view taken through the central plane of the pipe illustrated in Fig. 1;

Fig. 3 is a fragmentary plane sectional view taken through the line IIIIII of Fig. 2, in which the adjustable raft-controlling nut is situated below the orifice of the bowl exit port; and

Fig. 4 is a similar plane sectional view taken through the line IV-IV of Fig. 2.

The type of pipe illustrated herein comprises a bowl 5 with an exit port 6 and a holder 10. The holder 10 is provided with a shank which is bifurcated to provide the supporting members 11. After a certain distance, these supporting members are reunited to form a bit holder M and, if desired, the supporting members 11 may be reinforced by bridging elements along their separated course. A bit 15 is inserted into the bit holder 14. The shank portion nearest the holder is provided with a port 16 extending into the interior of the holder. A draw tube 12 is inserted into this port and extends into the bit holder 14.

The holder and its shank portion including the draw tube are usually made of light heat-conductive material such as a light metal, aluminum for example, in order to cool the smoke and condense moisture from the smoke. This cooling and condensing action is enhanced in the draw tube by the fact that it is exposed to air for the greater portion of its length and can be made of thingauge metal since it performs no substantial supporting function. The condensing moisture in the draw tube drains back to a large extent into the holder, which also traps any" moisture draining from the bowl itself during the course of combustion.

In present constructions, the draw tube is loosely fitted into the shank port 16 and the bit holder 14 so that on removal of the bit the draw tube may be withdraw for cleaning. I have found, however, that this arrangement is undesirable. The condensed moisture tends to leak at the loose joints between the draw tube and the shank port 16 and the bit holder, rendering the pipe unsightly and disagreeable to handle. Likewise, air entering at these points is likely to affect or vary the draft from the bowl and impair accurate draft control.

I prefer to anchor the draw tube into the pipe and to provide a tight seal between the connections of the draw tube with the shank port 16 and the bit holder 14. This may be done by swaging the metal of the draw tube to that of the shank port 16 and the bit holder 14. The ends of the draw tube may first be expanded at the connecting points, as is shown most clearly in Fig. 2 at the point of connection of the draw tube with the bit holder 14.

As illustrated, my draft-controlling means comprises a threaded stud 20 mounted in the holder 10 and extend-- ing into the bowl exit port 6. This exit port is flared outwardly from the orifice in the interior of the bowl to the outer surface of the bowl. A screw-threaded nut 21 is mounted on the stud 20, so that on rotation of the nut, it is moved along the stud 20 and may penetrate within the bowl exit port to any degree desired. Because of the flaring construction of the bowl exit port, the free area of the port is reduced as the nut is moved by rotation into the port or increased as the nut is retracted. It is desirable that the exit port should not be completely closed at the most extreme inner setting of the nut. This can be assured even with slight variations in the size of the exit port by making the nut of an irregular shape, i. e. off the round, such as the hexagonal shape shown in Figs. 3 and 4. This assures, as can be visualized in Fig. 4, that even when the outer points of the hexagon come into contact with walls of the exit port, there still remains a clearance between these walls and the sides of the hexagon. The irregular shape has the further advantage of giving a better grip on the nut during adjustment.

Access to the nut for draft-control adjustment is provided on removal of the bowl from the holder. The bowl is removably connected to the holder in any suitable manner, such as by a thread and screw connection. The bowl may be made of any materials conventionally used for such purposes in standard pipe construction.

I claim:

1. In a pipe construction comprising a tobacco bowl and a metal condensing holder therefor with a central port at the bottom of the bowl of smaller diameter than the bore of the bowl and extending from the interior of the bowl into said holder, the improvement which comprises a stud mounted on said holder and extending into said port up to approximately its orifice Within the interior of the bowl, said port being flared from said orifice to a larger opening within the holder, the respective dimensions of said stud and said orifice being so proportioned that said stud presents a relatively small tobacco-supporting surface and at the same time fills a substantial portion of the orifice so that tobacco will not tend to plug the free area between the stud and edge of said orifice, and draft-controlling means arranged for movement along said stud into selected portions Within said port so that movement of the draft-controlling means will vary the free area of said port.

2. The improvement claimed in claim 1, in which the relative movement of the draft-controlling means with respect to said stud is obtained by means of a screw-threaded connection between the two.

3. The improvement claimed in claim 2, in which the outer contour of the draft-controlling means is irregularly shaped.

4. The improvement claimed in claim 3, in which the draft-controlling means is a hexagonal nut.

UNITED STATES PATENTS Schneider Sept. 10, 1918 Shaffer Jan. 15, 1929 Dunwoodie Dec. 2, 1941 Bugg Jan. 1, 1952 FOREIGN PATENT Great Britain 1900 Great Britain May 29, 1924 France Mar. 18, 1920 

